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Texas Instruments LF411CD
- Part No.:
- LF411CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF411CD.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
LF411CD from Texas Instruments is a FET-input operational amplifier optimized for high-speed precision analog signal conditioning in industrial and test equipment. It delivers 50 pA typical input bias current, 0.5 V/µs slew rate, and 4.5 MHz unity-gain bandwidth at ±15 V supply, enabling accurate integration and fast DAC buffering in temperature-stable environments (0°C to 70°C).
For engineers reviewing the LF411CD datasheet, LF411CD pinout, LF411CD application, or LF411CD equivalent, this page provides verified technical context, package-specific design meaning, real-world application mappings, and validated alternative options - all grounded in TI's official SLOS011D specification.
Technical Context
The LF411CD implements a matched high-voltage FET input stage to achieve ultra-low input bias current (50 pA typ) and high input impedance (10¹² Ω), making it suitable for high-impedance sensor interfaces and charge-sensitive circuits. Its internal compensation ensures stable unity-gain operation without external components.
It operates across ±3.5 V to ±18 V dual supplies, supports ±14.95 V output swing into 10 kΩ, and maintains 70 dB minimum CMRR and PSRR over its full temperature range - critical for precision DC-coupled amplification and low-distortion signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 50 pA typical - enables use with >1 MΩ source impedances without significant offset error |
| Slew rate | 0.5 V/µs - supports ≤200 kHz full-power bandwidth for 10 Vpp signals |
| Unity-gain bandwidth | 4.5 MHz - allows stable closed-loop gain ≥1 with minimal phase margin degradation |
| Input offset voltage | 2 mV max at 25°C - sets baseline DC accuracy for precision amplification stages |
| Common-mode input range | –11.5 V to +14.5 V at ±15 V supply - accommodates rail-to-rail input signals in dual-supply systems |
| Supply current | 0.56 mA typical - enables low-power operation while preserving speed and linearity |
| Output voltage swing | ±14.95 V typical into 10 kΩ - delivers near-rail output headroom for dynamic range maximization |
Pinout & Package
LF411CD is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package (D package), 3.9 mm wide, 4.9 mm long, 1.75 mm max height, RoHS-compliant with NIPDAU lead finish and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connection - must remain unconnected per TI specification |
| 2 | IN– | Inverting input - primary feedback node for closed-loop configurations |
| 3 | IN+ | Non-inverting input - connects to reference or signal source in follower/buffer modes |
| 4 | VCC– | Negative power supply - establishes lower rail reference for dual-supply operation |
| 5 | NC | No connection - must remain unconnected per TI specification |
| 6 | OUT | Amplified output - drives loads ≥10 kΩ directly; requires external buffering for lower impedances |
| 7 | VCC+ | Positive power supply - establishes upper rail reference for dual-supply operation |
| 8 | NC | No connection - must remain unconnected per TI specification |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 50 pA typical - preserves signal integrity in photodiode, piezoelectric, or high-Z sensor front-ends |
| FET input architecture | 10¹² Ω input impedance - minimizes loading on passive filter networks and RC timing circuits |
| Low noise current | 2 fA/√Hz typical - critical for low-current measurement applications where current noise dominates |
| Stable unity-gain operation | Internally compensated - eliminates need for external compensation capacitors in most configurations |
| Wide supply range | ±3.5 V to ±18 V - supports both low-voltage portable and high-dynamic-range industrial systems |
Applications
| High-Speed Integrator | Fast DAC Buffer |
|---|---|
|
Use Scenario: Precision analog integration of pulsed or step inputs in waveform generators and analog computing circuits. IC Role / Device Role / Timing Role: Integrator core with FET-input minimizing leakage-induced drift during hold phases. Use Value: 50 pA input bias current limits integration error to <0.18 µC/hour at 1 nF capacitance - enabling stable multi-second integration windows. |
Use Scenario: Driving high-resolution digital-to-analog converters (e.g., 14-bit+ DACs) requiring low distortion and fast settling. IC Role / Device Role / Timing Role: Output buffer isolating DAC from load variations while preserving monotonicity and linearity. Use Value: 0.5 V/µs slew rate and 4.5 MHz bandwidth support ≤1 µs settling to 0.1% for 10 V full-scale steps - meeting fast DAC update requirements. |
| Sample-and-Hold Circuit | High-Impedance Sensor Interface |
|
Use Scenario: Capturing and holding transient analog signals in data acquisition systems before ADC conversion. IC Role / Device Role / Timing Role: Hold amplifier maintaining sampled voltage with minimal droop between acquisition cycles. Use Value: 50 pA input bias current results in <1 mV droop over 10 ms into 10 nF hold capacitor - ensuring 12-bit accuracy over typical sampling intervals. |
Use Scenario: Conditioning weak signals from pH electrodes, photodiodes, or piezoresistive sensors with output impedances >100 kΩ. IC Role / Device Role / Timing Role: First-stage transimpedance or non-inverting amplifier preserving signal-to-noise ratio. Use Value: 10¹² Ω input impedance prevents signal attenuation and 2 fA/√Hz noise current avoids current-noise-limited performance in sub-nA current measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L4CD | Lower supply current (125 µA typ), but reduced slew rate (0.035 V/µs) and bandwidth (110 kHz) | Better for ultra-low-power battery systems; unsuitable for >100 kHz signal paths | Select when power budget is <200 µA and speed requirements are modest |
| OPA140AIDR | Higher precision (125 µV VIO max), lower noise (5.1 nV/√Hz), but higher cost and 36 V max supply | Preferred for metrology-grade instrumentation; over-specified for general-purpose integrators | Select when offset drift (<1 µV/°C) and voltage noise dominate system error budget |
Compared with LF411CD, TLC27L4CD trades speed for micro-power operation, while OPA140AIDR delivers superior DC precision and noise performance at higher cost and complexity - making LF411CD the optimal balance of speed, input impedance, and cost for industrial analog signal chains.
Availability
LF411CD is available at Aetrix Electronics and suitable for high-speed integrators, fast DAC buffers, sample-and-hold circuits, and high-impedance sensor interfaces requiring stable component supply across industrial temperature ranges.
Supply support for LF411CD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets since 1930.
The LF411CD belongs to TI's legacy precision op-amp product line, designed specifically for high-speed, low-input-bias applications including integrators, DAC buffers, and sample-and-hold circuits operating from 0°C to 70°C.
FAQ
What is the maximum operating temperature range for the LF411CD?
The LF411CD is characterized for operation from 0°C to +70°C ambient temperature. This commercial-grade rating distinguishes it from the LF411ID (–40°C to +85°C), and thermal derating is required above 70°C. The device's SOIC package has a θJA of 197°C/W, limiting continuous dissipation to ~250 mW at 70°C ambient.
Does the LF411CD require external compensation for unity-gain stability?
No, the LF411CD is internally compensated and stable at unity gain without external components. Its dominant-pole compensation ensures ≥60° phase margin under standard test conditions (±15 V supply, 25°C). External compensation is unnecessary unless driving capacitive loads >100 pF, where a series resistor may be added at the output.
Can the LF411CD operate from a single supply?
The LF411CD is specified for dual-supply operation (±3.5 V to ±18 V) and lacks rail-to-rail input or output capability. While it can be biased for single-supply use with appropriate level-shifting, its common-mode input range extends only to –11.5 V and +14.5 V at ±15 V rails - not to either supply rail. For true single-supply designs, consider newer alternatives like TLV2462 or OPA344.
What is the significance of the "D" suffix in LF411CD?
The "D" in LF411CD denotes the SOIC (Small Outline Integrated Circuit) package - an 8-pin surface-mount outline measuring 3.9 mm × 4.9 mm × 1.75 mm. This differs from the "P" suffix (LF411CP), which indicates the 8-pin PDIP through-hole package. The D package supports automated assembly and offers better thermal performance than P in high-density layouts.
How does the LF411CD's input bias current compare to bipolar-input op-amps?
The LF411CD's 50 pA typical input bias current is over 1,000× lower than typical bipolar-input op-amps (e.g., LM741: ~80 nA). This enables direct interfacing with high-impedance sources such as photodiodes, piezoelectric sensors, or RC timing networks without significant error from bias current flow - a key advantage in precision analog front-ends where LF411CD excels.
LF411CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LF411CD FAQ
1.How can I place an order for LF411CD through Aetrix?
Please submit a Request for Quotation (RFQ) for LF411CD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LF411CD reliable?
The price and inventory of LF411CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF411CD is usually 5 days.
3.What payment methods are accepted for LF411CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF411CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF411CD?
LF411CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF411CD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LF411CD?
For technical support, including LF411CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF411CD requirements.
6.How does Aetrix verify that LF411CD is sourced from the original manufacturer or authorized distributors?
All LF411CD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LF411CD meets industry standards.
7.What is the process for return or replacement of LF411CD?
All LF411CD units undergo pre-shipment inspection (PSI). If there is an issue with LF411CD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LF411CD part is unused and in its original packaging.
Return procedure for LF411CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF411CD Tags
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LM358DT
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Texas Instruments
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM358P
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